<template>
  <div class="app-container">
    <el-input v-model="filterText" placeholder="搜索课程" style="margin-bottom:30px;" />

    <el-tree
      ref="tree2"
      :data="data2"
      :props="defaultProps"
      :filter-node-method="filterNode"
      class="filter-tree"
      default-expand-all
    />

  </div>
</template>

<script>
import subject from '@/api/edu/subject'
export default {

  data() {
    return {
      filterText: '',
      // data2: [{
      //   id: 1,
      //   label: 'Level one 1',
      //   children: [{
      //     id: 4,
      //     label: 'Level two 1-1',
      //   }]
      // }, {
      //   id: 2,
      //   label: 'Level one 2',
      //   children: [{
      //     id: 5,
      //     label: 'Level two 2-1'
      //   }, {
      //     id: 6,
      //     label: 'Level two 2-2'
      //   }]
      // }, {
      //   id: 3,
      //   label: 'Level one 3',
      //   children: [{
      //     id: 7,
      //     label: 'Level two 3-1'
      //   }, {
      //     id: 8,
      //     label: 'Level two 3-2'
      //   }]
      // }],
      data2: [],
      defaultProps: {
        children: 'children',
        label: 'title'
      }
    }
  },
  created(){
    this.getsubjectinfobytree()
  },
  watch: {
    filterText(val) {
      this.$refs.tree2.filter(val)
    }
  },

  methods: {
    getsubjectinfobytree(){
      subject.getsubjectbytree().then(response =>{
        this.data2=response.data.data
        console.log('testtree:',this.data2)
      })
    },
    filterNode(value, data) {
      if (!value) return true
      return data.title.indexOf(value) !== -1
    }
  }
}
</script>
